Abstract: A non-mechanical light-guiding device not subject to vehicular or other vibration includes a first electrode layer, a second electrode layer, and a light-guiding layer between the first electrode layer and the second electrode layer. The first electrode layer is configured to receive a first voltage and reflect a laser light received. The second electrode layer is configured to receive a second voltage. A reflection angle of the laser light is controlled by deformation of the first electrode layer under the first voltage and the second voltage and changes therein, and the light-guiding layer controls a propagation direction of the laser light according to the respective magnitudes of the first voltage and the second voltage.

Abstract: A laser beam system which is self-adjusting for ambient light conditions and which is not affected by vibration of a moving vehicle includes a light source, at least one scanning galvanometer, a detector, and a controller. The light source emits a laser beam, part of which is directed to the scanning galvanometer and part to a target object, the light reflected by the target object shares a light path with part of the emitted light. The detector receives the reflected light and generates signals accordingly. The controller receives the signals and obtains information of the target object as to distance and shape according to the signals of detection.

Abstract: An optical coupling lens includes main section, beam splitting section, first lens, second lens and third lens. A first groove is formed in the main section. A second groove is formed in the first groove. The beam splitting section includes a first total reflecting surface and a second total reflecting surface. A dihedral-angle between the first total reflecting surface and the second total reflecting surface is predetermined. The first lens is defined in the first groove. The first lens includes a beam splitter. The beam splitter includes a first light emitting surface. The first light emitting surface is connected to the first total reflecting surface. The second lens is defined in the second groove. The second lens is corresponding to the first lens. The third lens defined in the second groove. The third lens is corresponding to the second total reflecting surface.

Abstract: A lens mold includes a bottom mold and a top mold joining with the bottom mold. The bottom mold defines a first through hole. The top mold defines a second through hole. The lens mold further includes a bottom mold core and a top mold core. The bottom mold core is detachably received in the first through hole of the bottom mold. The top mold core is detachably received in the second through hole of the top mold. A plurality of microstructures is formed on a top surface of the bottom mold core near the top mold core to form a plurality of microstructures on a bottom surface of a lens formed by the lens mold. A method for manufacturing the lens with the lens mold is also provided. The lens is used as a secondary optical element for an LED.

Abstract: An optical coupling lens includes main section, beam splitting section, first lens, second lens and third lens. A first groove is formed in the main section. A second groove is formed in the first groove. The beam splitting section includes a first total reflecting surface and a second total reflecting surface. A dihedral-angle between the first total reflecting surface and the second total reflecting surface is predetermined. The first lens is defined in the first groove. The first lens includes a beam splitter. The beam splitter includes a first light emitting surface. The first light emitting surface is connected to the first total reflecting surface. The second lens is defined in the second groove. The second lens is corresponding to the first lens. The third lens defined in the second groove. The third lens is corresponding to the second total reflecting surface.

Abstract: A light diffusion plate includes a light-emitting region and an atomization reinforcing region connected to the light-emitting region. Light passing through the atomization reinforcing region is more greatly diffused than light passing through the light-emitting region.

Abstract: A measuring device is configured to measure a height of a mold. The measuring device includes a laser generator, a raster, a camera module, and a controller. The raster is positioned between the laser generator and the mold. A laser beam emitted by the laser generator is refracted by the raster to divide the laser into two laser beams. The two laser beams cooperatively define a predetermined angle ?. The camera module is configured to capture an image of the two laser beams irradiated onto the top surface. The controller is electrically connected to the camera module, and configured to receive the image and to calculate an actual distance D between the two laser beams, according to the image. The controller is capable of calculating a height H of the mold, according to D and the predetermined angle ?.

Abstract: Exemplary hot pressing equipment for forming spherical portions of light guide bodies includes a top pressing plate, a bottom pressing plate facing to the top pressing plate, a heating unit located in the top pressing plate or the bottom pressing plate to raise the temperature of the top pressing plate and the bottom pressing plate, and a cooling tube located between the top pressing plate and the bottom pressing plate. Grooves having spherical end surfaces array on the top pressing plate and the bottom pressing plate. The cooling tube delivers cooling fluid to reduce the temperature of the top pressing plate and the bottom pressing plate.

Abstract: A sun tracking device comprises a light sensing module, a processing module, a control module, and a driving module. The light sensing module includes eight light sensors, a pole fixing portion, and a pole. The eight light sensors each have a light sensing surface. The pole fixing portion has a fixing surface. The eight light sensing surfaces and the fixing surface cooperatively form a 3×3 grid, and the fixing surface is in the middle of the grid. The pole extends from the fixing surface. The processing module is configured for determining the direction of the sun, and calculating a rotating direction and angle of the light sensing module. The control module is configured for sending out a rotating instruction. The driving module is configured for driving the light sensing module to rotate so that the sunlight perpendicularly shines onto the light sensing surface.

Abstract: A lens for diverging light includes a bottom surface, a recess defined in the bottom surface, a lower inner curved surface in the recess, and an upper outer curved surface. The lower inner curved surface is configured for receiving light emitted from a light source. The lower inner curved surface includes an inwardly curved lower portion adjacent to the bottom surface, a flat surface portion arranged at a center of a bottom in the recess, and an inwardly curved intermediate portion connected between the lower portion and the flat surface portion. The upper outer curved surface faces away from the bottom surface.

Abstract: A backlight module includes a light guide plate and a number of light sources. The light guide plate includes a frosted light incident surface, diffusion structures positioned on the frosted light incident surface, and dot-shaped micro-recesses positioned on the diffusion structures. The light sources face the frosted light incident surface.

Abstract: A detection system for detecting a distance value between a light source and a group of optical films of a back light module includes a base, a luminance detection device, a transfer device, and a distance detection device. The base is configured for supporting the light source. The luminance detection device is configured for detecting a luminance value of the light emitted from the back light module. The transfer device is configured for driving the group of optical films to move relative to the light source. The distance detection device is configured for detecting the distance between the light source and the group of optical films when a luminance value detected by the luminance detection device is equal to or larger than a provided luminance. A detection method using the above detection system is also provided.

Abstract: A writing device includes an emitter and a light emitting diode display panel. The light emitting diode display panel includes an array and a receiver. The array has a plurality of pixels each including a first light source, a second light source, a third light source, a driving circuit and a light detecting device. The light detecting device is configured to receive the control signal from the emitter and transmit the control signal to the driving circuit to turn on the pixel. The receiver is electrically connected with the driving circuit. The receiver is configured to receive at least one of the first selective signal, the second selective signal and the third selective signal and transmit it to the driving circuit to turn on at least a corresponding one of the first light source, the second light source, and the third light source.

Abstract: An exemplary lens for regulating light of an LED includes a light guiding portion and a latching portion extending downwardly from the light guiding portion. The light guiding portion includes a top surface and a bottom surface opposite to the top surface. A center of the bottom surface is depressed toward the top surface to form an optical concave. The latching portion is formed at the bottom surface and located around the optical concave surface. The latching portion defines an engaging hole to fittingly receive the LED therein. A light source module having the lens is also provided.

Abstract: A light guide plate includes a light incident surface, a bottom surface connected to the light incident surface, and a light output surface facing away from the bottom surface. The light output surface is a roughened surface. A number of microstructures are formed on the light output surface. A method for making the light guide plate is also described.

Abstract: An auto-stereoscopic display device includes an image display module, a parallax barrier, a camera, and a processor. The image display module includes left eye pixels and right eye pixels arranged alternately. The parallax barrier includes opaque parts and light-transmissible parts arranged alternately. The camera is configured to capture an image in front of the auto-stereoscopic display device. The processor includes a face identifying module configured to determine whether a face exists in the image and determine a position of the face in the image when the face exists in the image, and a parallax barrier adjusting module configured to adjust positions of the opaque parts and the light-transmissible parts according to the position of the face in the image, so that a left eye is only capable of seeing the left eye pixels, and a right eye is only capable of seeing the right eye pixels.

Abstract: A light guide plate includes a bottom surface, a light-emitting surface, a light incident surface, a first side surface, a second side surface, and a number of ribs protruding from the bottom surface away from light-emitting surface. The ribs extend substantially parallelly from the first side surface to the second side surface and are continuously arranged without gaps in between. Each rib includes a first surface, a second surface, and a third surface. The first surface and the second surface extend from the bottom surface. The second surface is further from the light incident surface than is the first surface. A first included angle between the first surface and the bottom surface is an acute angle, and the third surface connects the first surface to the second surface.

Abstract: A liquid crystal display (LCD) device includes a backlight module and an LCD panel. The backlight module includes an array of light emitting units and an optical film unit. Each of the light emitting units includes a laser light source unit configured to emit a white light and a scanning mirror configured to reflect the white light to different directions to light a target area. The white light reflected by the scanning mirror is transmitted by the optical film unit and the LCD panel in sequence.

Abstract: An LCD device includes a backlight module, a liquid crystal layer, a brightness detecting module and a control unit. The backlight module includes a light guide plate and light sources. The light guide plate includes a light-mixing part and a light-homogenized part. Protrusions are positioned on the light guide plate. A density of the protrusions in the light-mixing part is greater than that in the light-homogenized part. The liquid crystal layer includes an adjustable part corresponding to the light-mixing part and a nonadjustable part corresponding to the light-homogenized part. The brightness detecting module acquires a brightness distribution data of the liquid crystal layer. The control unit makes a brightness of the adjustable part coincide with a brightness of the nonadjustable part according to the brightness distribution data.

Abstract: A spiral cutting device includes a blade, a blade driving shaft, a guiding device, a driving device, and a controller. The blade is for processing a roller. The blade driving shaft drives the blade to move toward the roller. The guiding device moves in a guiding direction perpendicular to a moving direction of the blade. The driving device is movably supported on the guiding device and rotates the roller. The controller controls a feeding amount of the blade, a moving speed of the driving device, and a rotate speed of the roller to spirally cut the roller. When an outer surface of the roller is unfolded to a plane, the blade path of the blade is in sinusoidal shape or in cosinusoidal shape.